As soon as i have fitted 4 pipe exhaust . I want to have computer remapped ,but i have seen a plug and play device cost 177.00, which looks quite good. Not sure which way to go am thinking remap may be best way because of work done on engine. Would like advice from others also recommend tuners to go to for remap and rolling road before and after. i live in poole but am willing to travel up to 150 miles.